Ruboxistaurin is a drug initially developed for treatment of diabetic peripheral retinopathy. The proposed indication for ruboxistaurin in this study is the treatment of adult patients with New York Heart Failure Association (NYHA) Class III-IV heart failure. Ruboxistaurin is a protein kinase c-alpha (PKC-alpha) inhibitor and thus will produce an inotropic effect in the heart which holds the potential to improve cardiac function.